From b8b309f68f53d0b68a8146569ecfaa4d262b96b0 Mon Sep 17 00:00:00 2001
From: Juan Miguel Carceller <jmcarcell@users.noreply.github.com>
Date: Wed, 29 Apr 2026 16:58:02 +0200
Subject: [PATCH] Add a check for when there aren't
 trackerHitRelationCollection

---
 Tracking/src/ClicEfficiencyCalculator.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Tracking/src/ClicEfficiencyCalculator.cc b/Tracking/src/ClicEfficiencyCalculator.cc
index d7e7ee6..a27eb1a 100644
--- a/Tracking/src/ClicEfficiencyCalculator.cc
+++ b/Tracking/src/ClicEfficiencyCalculator.cc
@@ -332,7 +332,8 @@ void ClicEfficiencyCalculator::processEvent( LCEvent* evt ) {
     // Get the collection of tracker hit relations
     LCCollection* trackerHitRelationCollection = 0 ;
     getCollection(trackerHitRelationCollection, m_inputTrackerHitRelationCollections[collection], evt);
-    
+    if(trackerHitRelationCollection == 0) continue;
+
     // Create the relations navigator
     std::shared_ptr<LCRelationNavigator> relation =
       std::make_shared<LCRelationNavigator>( LCRelationNavigator( trackerHitRelationCollection ) );